Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 146 for “"oxidation states"”.
-
Probing the reactivity of uncommon palladium oxidation states
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
-
Materials development for multicomponent systems with variable oxidation states
… of the exothermic reactions and control the oxidation state, the precursor solutions had to be dried at low temperature (~70°C - 80°C) to avoid early nitrate/organic decompositions and the micro and macro atmospheres in the process had to be controlled. The micro atmosphere was controlled by …
-
Reduced molybdenum oxidation states in hydrodesulfurization catalysis by Chevrel phases
… analysis demonstrated that reduced molybdenum oxidation states were present at the surface, compared to the Mo[superscript]4+ state of MoS[subscript]2 catalysts;The effect of the oxidation state of molybdenum on the catalytic HDS of thiophene was investigated using a series of lead-lutetium …
-
The Stabilization of Unusual Oxidation States of Nickel With Oxime Ligands
Made available in DSpace on 2014-12-10T23:00:58Z (GMT). No. of bitstreams: 1 7114674.pdf: 5939978 bytes, checksum: 4c7a0a7a84e4822c0490f9dfa3763df7 (MD5) Previous issue date: 1970
-
Anion exchange study of the oxidation states of the halogens, including astatine
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1960
-
Synthesis, characterization, and reactivity of technetium and rhenium complexes in intermediate oxidation states.
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1979.
-
Coordination chemistry of unusual oxidation states of nickel and palladium relevant to homogeneous catalysis
… controlling the reactivity of these ‘unusual’ oxidation states of Ni and Pd promises to expand their roles in various bond-breaking and bond-making processes catalyzed by such complexes. This is the central question that this thesis aims to answer, with the focus being on the chemistry of …
-
The effect of vanadium oxidation states on the conversion of hydrogen sulphide to elemental sulphur
… sulphur. However, the effect of vanadium oxidation states (V⁴⁺ and V⁵⁺) on hydrogen sulphide ions (HS⁻) conversion to sulphur product and its quality has not been systematically studied hence the purpose of this study was to understand these effects. A series of experiments was conducted …
-
The Stabilization of MN (I) and MN (II) Oxidation States by the Formation of Coordination Compounds
A careful examination of the literature shows that manganese exhibits striking variations in valency, (1,2,3,4,6, and 7), and in each stage there are well-defined coordination compounds. |Although there are a large series of bivalent manganese compounds, in general, the Mn+2 ion exhibits a weak …
-
Oxidation states of copper on the (001) magnesium oxide surface, and the adsorption of hydrogen, oxygen and carbon monoxide atop copper on the (001) magnesium oxide surface (an ab-initio cluster calculation in the Hartree-Fock approximation)
The oxidation states of Cu on the (001) MgO surface have been studied with an Ab-Initio cluster (S-atoms-plus-charge-array) calculation in the Hartree-Fock approximation, for two cases: (i) Cu above a surface oxygen, and (ii) Cu in a surface Mg-vacancy. Cu binds slightly atop oxygen with a bind~ng …
-
The nature and role of oxidation state dependent conformational differences in cytochrome c
… role of conformational differences between the oxidation states of cytochrome c. Using x-ray crystallographic techniques, the oxidized form of yeast iso-l-cytochrome c was solved and compared to the previously determined reduced state. The following differences between the oxidation states were …
-
THE EFFECT OF ALTERNATING DISTRIBUTION OF TRANSITION METALS IN LAYERED MATERIALS ON OXYGEN EVOLUTION CATALYSIS
… they are cheap, abundant and possess variable oxidation states. However, most of them give only moderate catalytic activities, compared with noble-metal-based materials. To achieve efficient catalysts while maintaining low cost, it is important to discover and modify new systems based on the …
-
Studies on the analytical chemistry of chromium in aqueous solutions
Quantitative differentiation of the various oxidation states of chromium by coprecipitation and preconcentration of trivalent chromium in aqueous solutions using iron(III) hydroxide as the coprecipitating agent has been studied. Recoveries of trivalent chromium are less than 100% because of …
-
Metal-ligand redox interaction in the multielectron chemistry of porphyrinogen coordination compounds
… redox-inert metal dications exist in three oxidation states, dianionic, neutral, and dicationic, characterized structurally by zero, one, and two direct bonds between adjacent pyrroles, respectively. All three are isolated on the preparative scale, and interconverted electrochemically …
-
A theoretical investigation in heterogeneous gold catalysis
… the zinc vacant site of this surface. The higher oxidation states are unstable with respect to auto-reduction by the ZnO surface (i.e. their LUMO energies were below the HOMO of a bare ZnO surface. However, gold hydroxyls, where gold has + 1 to +3 oxidation states, can be stabilized at the …
-
Characterizations of plutonium nitrate solutions for criticality calculations
… situation of chemistry, plutonium has four oxidation states (III), (IV), (V), and (VI) that can exist in finite concentrations, simultaneously in aqueous solutions, in equilibrium with each other.
-
Environmental fate and effects of chromium(III) and (IV) investigated using electroanalytical chemistry.
… and (VI), the toxicity of these chromium oxidation states to three aquatic organisms, at varying salinities have been determined. A further study explored the impact of organic chelators on the toxicity of both chromium oxidation states to one of the organisms, Tisbe batagliai. The …
-
The electrochemical mediation of oxygen delignification of pulp with a manganese polyol complex
… at a cathode was used to reduce the higher oxidation states of the manganese complex. The reaction of the manganese (II) and (III) complex forms with oxygen is believed to produce hydrogen peroxide. Evidence presented in this study suggests a redox cycle was operating involving the manganese …
-
De novo prediction of the ground state structure of transition metal complexes.
… coordination), different coordination numbers, oxidation states and various numbers of electrons in d orbitals have been studied. Moreover, ligands that are single, double or triple bonded to the transition metal, exhibiting diverse electronic and steric effects, have been investigated. In this …
Page 1 of 8